changes by me:
- add HOMEPAGE to DESCR
- remove license type
- add SEPARATE_BUILD option
- remove unnecessary re-installation of man page durring post-install
- move message from post-install to pkg/MESSAGE
Thoroughly unsubtle, most mkdir -p should probably be INSTALL* at
*install stage, and echo/ECHO_MSG is somewhat unsorted.
It's quite possible I missed a few automated changes...